LABORATORY REVIEW
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Single RNA strands can copy in solutions containing nucleotides without enzymes.
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RNA molecules called ribozymes have been found to catalyze many different reactions
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RNA come first before DNA
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Aggregates of artificially produced prebiotic molecules
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Detailed explanation-1: -The RNA world hypothesis suggests that life on Earth began with a simple RNA molecule that could copy itself. The RNA world hypothesis suggests that life on Earth began with a simple RNA molecule that could copy itself without help from other molecules. DNA, RNA, and proteins are central to life on Earth.
Detailed explanation-2: -The unique potential of RNA molecules to act both as information carrier and as catalyst forms the basis of the RNA world hypothesis. RNA therefore has all the properties required of a molecule that could catalyze its own synthesis (Figure 6-92).
Detailed explanation-3: -The RNA world hypothesis suggested that life started with single self-replicating molecules. Among several other hypotheses, autocatalytic sets could have been formed that used initially metals and other small self-produced molecules as catalysts that were able to produce basic blocks first for RNA, then for proteins.
Detailed explanation-4: -ARGUMENTS FOR RNA WORLD DNA is found to form on the primordial world spontaneously unlike RNA (however, experiments are still going on.) RNA is also known to act as an information store. DNA encodes the genes used to produce proteins. RNA can effectively self-replicate itself.
Detailed explanation-5: -Walter Gilbert, which was a Harvard molecular biologist, was the first one to use the term “RNA World” in one article that was published in the year 1986. The hypothesis says that the DNA later became the genetic material as a result of the evolution since RNA was a relatively unstable molecule.